<template>
  <div class>
    <dl class="m-categroy">
      <dt>按拼音首字母选择：</dt>
      <dd v-for="item in list" :key="item">
        <a :href="'#city-'+item">{{ item }}</a>
      </dd>
    </dl>
    <dl v-for="item in block" :key="item.title" class="m-categroy-section">
      <dt :id="'city-'+item.title">{{ item.title }}</dt>
      <dd>
        <span v-for="c in item.city" :key="c">{{ c }}</span>
      </dd>
    </dl>
  </div>
</template>

<script>
import pyjs from "js-pinyin";
export default {
  data() {
    return {
      list: "ABCDEFGHIJKLMNOPQRSTUVWXYZ".split(""),
      block: []
    };
  },
  created() {
    let blocks = [];
    this.$axios.get("/geo/city").then(res => {
      if (res.status === 200) {
        let p;
        let c;
        let d = {};
        let city = res.data.city;
        city.forEach(item => {
          p = pyjs
            .getFullChars(item.name)
            .toLocaleLowerCase()
            .slice(0, 1);
          c = p.charCodeAt(0);
          if (c > 96 && c < 123) {
            if (!d[p]) {
              d[p] = [];
            }
            d[p].push(item.name);
          }
        });
        for (let [k, v] of Object.entries(d)) {
          blocks.push({
            title: k.toUpperCase(),
            city: v
          });
        }
        blocks.sort((a, b) => a.title.charCodeAt(0) - b.title.charCodeAt(0));
        this.block = blocks;
      }
    });
  }
};
</script>

<style lang="scss">
@import "@/assets/css/changeCity/categroy.scss";
</style>
